Your teacher knows the textbook by heart. If you turn in homework citing page 147 of the 2014 PDF, and the current book has that content on page 198, you will be caught. Don't risk your grade for a free download.

Instead, use the if you can afford it, or the free regional government textbooks if you cannot. Pair these with YouTube summaries, and you will not only pass your history exam—you will actually understand why the world looks the way it does today.

¡Ánimo con la historia contemporánea! Have you found a legitimate source for the Santillana digital book? Share your tips in the comments below (no illegal links, please!)